Mahogany Splendor

Hibiscus acetosella

Wikimedia Commons

Decorative, deeply cut foliage with maple-leaf appearance, rich color, and sturdy branches. Ideal for late summer and fall arrangements. Primarily grown for use as cut flower foliage, the vigorous, drought- and heat-tolerant plants are also suitable for containers and landscaping. The abundant color and tall stature make Mahogany Splendor a lovely backdrop in the garden or patio. NOTE: If grown indoors or in part shade, foliage will be green to rust in color; the mahogany color develops fully in full sun. Also known as red-leaf hibiscus, false roselle, African rose mallow, and cranberry hibiscus. Tropical, herbaceous perennial in Zones 8a-9b. Tender perennial or annual in all other growing zones.

Harvest

115-130d

Days to harvest

📅

Sun

Full sun

☀️

Zones

9–11

USDA hardiness

🗺️

Height

3-5 feet

📏

Planting Timeline

Zone:

Jan

Feb

Mar

Apr

May

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Aug

Sep

Oct

Nov

Dec

Transplant

Showing dates for Mahogany Splendor in USDA Zone 7

All Zone 7 shrub →

Zone Map

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Mahogany Splendor · Zones 9–11

What grows well in Zone 7? →

Growing Details

Difficulty

Moderate

Spacing24-36 inches

SoilWell-drained, fertile soil; slightly acidic to neutral pH preferred

WaterModerate; drought tolerant once established

SeasonTender Perennial

ColorDeep mahogany-red

Zone-by-Zone Planting Calendar

Zone	Indoor Start	Transplant	Direct Sow	Harvest
Zone 3	—	June – August	—	—
Zone 4	—	June – July	—	—
Zone 5	—	May – July	—	—
Zone 6	—	May – July	—	—
Zone 7	—	May – June	—	—
Zone 8	—	April – June	—	—
Zone 9	—	March – May	—	—
Zone 10	—	March – April	—	—
Zone 11	—	February – March	—	—

Complete Growing Guide

Light: Full sun (6 or more hours of direct sunlight a day). Drainage: Good Drainage, Moist. Height: 3 ft. 0 in. - 5 ft. 0 in.. Spread: 1 ft. 0 in. - 2 ft. 6 in.. Spacing: 3 feet-6 feet. Growth rate: Rapid. Maintenance: Medium. Propagation: Seed, Stem Cutting.

Harvesting

The fruit is a brown, oval, 1 to 1¼ inch long seed capsule that appears from July to October. The beaked capsules turn brown within 4 to 5 weeks of the flowers blooming. Each capsule contains a ring of seeds. The seeds are dark brown, reniform, flat, and hairless.

Color: Brown/Copper. Type: Capsule. Length: 1-3 inches. Width: 1-3 inches.

Harvest time: Fall, Winter

Bloom time: Fall, Summer

Storage & Preservation

Fresh foliage should be kept in a cool location, ideally in the refrigerator at 34-40°F with moderate humidity (60-70%) to prolong vase life. Stems can last 10-14 days in water when kept cool. For preservation, air-dry branches by hanging upside-down in a warm, well-ventilated space for 2-3 weeks to retain the mahogany color. Alternatively, press individual leaves between parchment paper under heavy weight for 4-6 weeks for craft use. Glycerin preservation is also effective: place cut stems in a glycerin-water solution (1:3 ratio) for 2-3 weeks to maintain flexibility and color while drying.

History & Origin

Origin: Burundi to S. Tropical Africa

Advantages

+Attracts: Bees, Specialized Bees
+Fast-growing

Companion Plants

Mahogany Splendor sits well with shade-tolerant understory plants — Hosta, Heuchera, and ferns — because they fill the lower 12–18 inches of a bed without competing at the same root depth or canopy level. Azalea, Rhododendron, Camellia, and Pieris make good neighbors for a practical reason: they're all comfortable in well-drained, moderately acidic soil with similar moisture rhythms, so you're not managing conflicting irrigation needs across the same bed. Astilbe adds a fine-textured vertical contrast without crowding the hibiscus root zone.

Black Walnut produces juglone, a root-zone compound that suppresses a wide range of ornamentals — and Hibiscus acetosella is sensitive enough that proximity can produce a slow, confusing decline with no single obvious cause. Eucalyptus and Pine drop allelopathic leaf litter that acidifies the surrounding soil sharply over time. Maple is a problem for a more straightforward reason: its surface roots spread aggressively and will out-compete Mahogany Splendor for moisture during dry spells.

Plant Together

Azalea

Similar soil pH and moisture requirements, complementary bloom times

Rhododendron

Thrives in same acidic soil conditions and partial shade environment

Camellia

Compatible growth habits and shared preference for well-draining acidic soil

Pieris

Similar water needs and tolerance for acidic conditions

Hosta

Provides ground cover while tolerating shade created by shrub canopy

Fern

Thrives in moist, shaded conditions beneath shrub, adds textural contrast

Heuchera

Shallow roots won't compete, adds colorful foliage in partial shade

Astilbe

Enjoys similar moisture levels and provides complementary flowering display

Keep Apart

Black Walnut

Produces juglone toxin that inhibits growth of many woody shrubs

Eucalyptus

Allelopathic compounds suppress growth of nearby plants

Pine

Dense needle drop creates overly acidic conditions and blocks sunlight

Maple

Shallow, dense root system competes aggressively for water and nutrients

Troubleshooting Mahogany Splendor

What you'll see, why it happens, and what to do about it.

Leaves developing yellow patches with a powdery white coating on the surface, most visible in late summer

Likely Causes

Powdery mildew (Erysiphe cichoracearum) — favored by warm days, cool nights, and poor airflow
Overcrowded planting at less than 24 inches apart

What to Do

1.Cut out the worst-affected stems at the base and dispose of them — don't compost them
2.Spray remaining foliage with a diluted neem oil solution (2 tbsp per gallon of water) every 7 days until symptoms stop spreading
3.Next season, keep spacing at the full 36 inches if you're planting in a humid spot

Stems wilting and collapsing at the soil line, often with a dark, water-soaked rot at the base

Likely Causes

Phytophthora root rot — triggered by consistently waterlogged soil, especially in heavy clay
Planting too deep so the crown stays wet

What to Do

1.Pull the plant and check the roots — if they're brown and mushy past the crown, the plant is unlikely to recover
2.Improve drainage before replanting: work in 2–3 inches of coarse perlite or grit, or build a raised mound
3.Water only when the top 2 inches of soil are dry; Mahogany Splendor handles drought better than wet feet once established

Foliage fading from deep burgundy to a washed-out greenish-bronze, no obvious pest damage

Likely Causes

Insufficient sunlight — fewer than 6 hours of direct sun daily significantly reduces anthocyanin pigmentation
Nitrogen overload from high-N fertilizers, which pushes green chlorophyll production at the expense of red pigments

What to Do

1.Move the plant (or next year's planting) to a spot with at least 6 full hours of direct sun
2.Switch to a balanced fertilizer (10-10-10 or similar) rather than anything high in nitrogen
3.If the plant is in-ground and can't be moved, thin surrounding plants or structures casting shade

Ragged holes in leaves and a shiny slime trail visible in the morning, especially on lower foliage

Likely Causes

Slugs (Deroceras reticulatum or similar) — most active at night and during wet stretches
Mulch piled directly against the stem, giving slugs a cool, moist hiding spot

What to Do

1.Pull mulch back at least 3 inches from the stem so slugs lose their daytime shelter
2.Set out iron phosphate bait (Sluggo or equivalent) around the base — safer around pets and wildlife than metaldehyde
3.Hand-pick slugs after dark with a flashlight for a few nights running; it makes a real dent in the local population

Frequently Asked Questions

How long do Mahogany Splendor cut stems last in a vase?▼

Fresh cut stems typically last 10-14 days when kept in cool water (34-40°F) and changed every 2-3 days. Removing lower foliage and splitting the stem ends helps improve water absorption and extends vase life. Cooler temperatures significantly slow senescence.

Can you grow Mahogany Splendor in containers?▼

Yes, Mahogany Splendor is well-suited for container growing. Choose a large pot with good drainage, use quality potting soil, and place in full sun (6+ hours daily) for optimal mahogany color development. Container plants are ideal for patios and can be brought indoors in colder zones.

What color does Mahogany Splendor foliage develop in shade?▼

In partial shade or indoors, foliage remains green to rust-colored rather than deep mahogany. The rich mahogany pigmentation develops fully only in full sun with 6+ hours of direct sunlight daily. This sun requirement is critical for achieving the signature ornamental color.

When should I plant Mahogany Splendor for fall arrangements?▼

Plant in spring after the last frost date for zones 8a-9b, or start as an annual in colder zones. This timing allows 115-130 days to reach harvestable maturity by late summer and early fall, perfect for seasonal floral arrangements.

Is Mahogany Splendor suitable for beginners?▼

With moderate difficulty level, it's accessible to novice growers. The plant is drought and heat-tolerant once established, requiring minimal special care. The main consideration is ensuring adequate full sun for proper color development and healthy foliage production.

What are other common names for Mahogany Splendor?▼

Also known as red-leaf hibiscus, false roselle, African rose mallow, and cranberry hibiscus. These names reflect its tropical origin and ornamental foliage characteristics that resemble hibiscus and maple leaves.